大肠杆菌和弗氏志贺氏菌临界生长温度的研究

本文通过对大肠杆菌(Escherichia coli)和弗氏志贺氏菌(Shiglla flexneri)生长速率常数的研究,提出了k~(1/2)=a+bT的线性关系式。借助此线性关系式,本文得到了以上2种细菌的临界生长温度T_0=-a/b。实验证明:k~(1/2)-T的相关系数比lnk-1/T的相关系数高;同1细菌在不同培养基中的临界生长温度基本上是1个常数,不同的细菌则临界生长温度不同;常数b是与培养基有关的常数,本文定义为细菌的培养基常数。

A STUDY ON THE CRITICAL GROWTH TEMPERATURES OF SHIGLLA FLEXNERI AND ESCHERICHIA COLI

In this paper we have studied the growth rate constants of S. flexneri and E. coli at different temperatures and given a linear equation k~(1/2)=a+bT.With help of the linear equation, we have obtained T_0=-a/b, the critictl growth temperatures of the two bacteria. The experiments have proved that the correlation coefficient of k~(1/2)-T is greater than that one of lnk -1/T; that the critical growth temperatures for the same bacteria are constant in various media, but for different bacteria the critical growth temperatures are different in same media, that b is a constant only relative to the media and bactcria, so b is defined as medium constant of the bacteria.